Question

① $(-1 - -8) + 4$
② $(7 + -12) \cdot 9$

Explanation:

Step1: Simplify inner parentheses (U)

$-1 - (-8) = -1 + 8 = 7$

Step2: Add 4 to result (U)

$7 + 4 = 11$

Step3: Simplify inner parentheses (E)

$7 + (-12) = 7 - 12 = -5$

Step4: Multiply by 9 (E)

$-5 \times 9 = -45$

Answer:

U: 11
E: -45